What organism is the main producer in freshwater ecosystems?

a. phytoplankton

b. zooplankton

c. anaerobic bacteria

d. none of the above

Define the three major types of bacterial shapes. which of these did you observe in the exercise?

Why do most stars not necessarily die in the time we would normally expect them to?

And comparing a desert to on Mars which statement is not true

carbon dioxde and atmospheric dust are minor components in Earth's atmosphere, but they play a role large role in climate change. Describe how carbon dixide can affect a change in climate.

What class does the penguin belong to

What do all cells in a multicellular organism have in common

One of your friends has decided to make it his life's work to characterize all functional proteins, as he is convinced that all possible amino acid combinations can result in a protein. is it possible to confirm his hypothesis in this way

A membrane-bound compartment inside chloroplasts and cyanobacteria that is the site of the light-dependent reactions of photosynthesis is

Which food supplies only discretionary kcalories? a. bagel b. peanut butter c. grape jelly d. raisins?

Members of which two domains of life are composed of one or more prokaryotic cells?